Iowa State University (ISU) predictive models indicate in 2021, many areas of Iowa have more nitrogen (N) than an average fall. There could be an opportunity for farmers to spread out or delay input costs and avoid sending excess N downstream.
4R Plus encourages farmers to work with their ag retailer or CCA to test soil this fall to verify N levels. Click here for more recommendations that make economic sense and protect water quality.
ISU predicted soil nitrate levels as of September 2021, courtesy of Dr. Sotirios Archontoulis, Associate Professor of Agronomy, ISU. Updates will be posted shortly to this link.
The soil retains more nitrogen during a drought, leading to several management challenges. Learn why farmers are being encouraged to test soil before making fall fertilizer application decisions.